Quick change roller coating plate



April 27, 1965 E. w. GARTz 3,180,007

QUICK CHANGE ROLLER COATING PLATE Filed Dec. 13, 1963 46 fm/HMM 9M A TTOEIVE YS United States Patent O 3,130,007 QUICK CHANGE ROLLER COATING PLATE Ernest W. Gartz, '79 Marion St., Carteret, NJ. Filed Dec. 13, 1963, Ser. No. 330,493 4 Claims. (Cl. 29-124) This invention relates to rollers for applying coating material to sheets of tin plate, or the like, and more particularly to rollers having replaceable outer surface sections.

A main object of the invention is to provide a novel and improved roller for use with machines for coating sheets of tin plate with various types of material, for example, for coating sheets of tin plate which are to be used for making cans, the roller being provided with removable rubber surface sections so that damaged portions of the roller surface may be readily replaced, making it unnecessary to replace a complete roller when only a small portion of its outside surface is damaged.

A further object of the invention is to provide an improved rubber surfaced coating roller which is provided with replaceable rubber coating outer surface sections, which provides greater economy in the utilization of existing rollers, which eliminates lost time in repairing and replacing rollers when surface portions thereof become damaged, and eliminating the need for keeping a large stock of roller cores on hand, such as spare rollers for use when other rollers are being repaired.

A still further object of the invention is to provide an improved roller for coating sheets of tin plate with various materials, as required in the manufacture of tin cans, the roller having replaceable outer segments in various shapes and sizes and which can be easily removed or replaced, as required, the improved roller being low in cost, providing economical utilization of the major portions of the roller by enabling surface segments thereof to be readily replaced when they become damaged, and reducing inventory requiremnets with respect to the need for keeping a large stock of roller cores on hand for various roller styles.

A still further object of the invention is to provide an improved coating roller for use on a machine for coating sheets of tin plate with various materials, for example, in the manufacture of tin cans, the improved roller having replaceable rubber coating surface segments which can be easily replaced whenever they become damaged thereby minimizing the loss of opera-ting time for the associated machine, since a damaged section of the coating surface of the roller can be replaced in a very short time and without the necessity of cutting the roller to a required dimension or for resetting the machine for operation.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

FIGURE l is a perspective view of an improved coat ing roller constructed in accordance with the present invention.

FIGURE 2 is an enlarged transverse vertical cross sectional view taken substantially on the line 2-2 of ,FIG- URE 1.

FIGURE 3 is an enlarged fragmentary perspective View showing the end portion of one of the replaceable roller outer surface segments employed in the roller of FIG- URES 1 and 2.

FIGURE 4 is a perspective view of a roller according to the present invention but showing a modified form thereof.

FIGURE 5 is a fragmentary perspective view showing a portion of the roller of FIGURE 4 with an associated replaceable outer surface segment and a pair of fastening screws for attaching the segment to the roller core, the

t parts being shown in separated positions.

FIGURE 6 is a fragmentary perspective View of a still further modified form of rubber-surfaced coating roller constructed in accordance with the present invention.

FIGURE 7 is a fragmentary enlarged cross sectional View taken substantially on the line 7-7 of FIGURE 6.

FIGURE 8 is a schematic vside elevational view showing a system for applying coating material to a sheet of tin plate, employing a coating roller according to the present invention.

Referring to the drawings, and more particularly to FIGURES 1, 2 and 3, 11 generally designates an assembled coating roller for use in a conventional machine for coating sheets of tin plate with various materials, the roller being constructed in accordance with the present invention. The roller '11 comprises a generally cylindrical, elongated main steel core 12 provided at its opposite ends with the outwardly projecting axial shaft elements 13. Secured on the cylindrical outer surface of the core 12 are a plurality of longitudinally extending coating segments 14, each coating segment comprising a metal base strip 15 which is arcuately curved to conform with the curvature of the cylindrical core 12 and which is provided at its opposite ends with a pair of apertures 16, 16 which are countersunk and Which are adapted to receive fastening screws 17. The fastening screws 17 are threadedly engaged in the opposite end portions of the steel core 12 and fasten the strips 15 thereto. The strips 15 are further provided between the apertures 16, 16

, with inwardly projecting aligning pins 18 which are located so as to enter corresponding recesses provided in the steel core 12 so as to properly position the base strips 15 on the steel core in longitudinally extending positions on the core. Bonded onto the convex surfaces of the strips 15 are layers of rubber, shown at 19, or of plastic material having suitable resiliency, as required for properly coat ing tin plate with the intended coating materials. As shown in FIGURES l and 3, the resilient outer layers 19 of the segments 14 terminate just short of the apertures 16, 16 at the opposite ends of the base strips 15, allowing free access to the fastening screws 17, for easy removal and replacement of the sections 14, whenever required.

The sections 14 fit closely together on the core 12, the edges of the longitudinally extending segments 14 being substantially in abutment with each other, whereby the adjacent resilient layers 19 define a substantially continuous resilient surface covering the major portion of the y associated core 12.

Whenever one or more of the .resilient exterior layers 19 becomes damaged, the associated sections 14 may be prising a circumferentially continuous series of replaceable surface segments 21, each segment 21 comprising a metal base portion 22, arcuately curved to conform With the exterior contour of the core 12. Bonded onto the convex surface of the segment base element 22 is the exterior pad of resilient deformable material, shown at 23, comprising rubber or plastic material. The end portions of the arcuately curved base member 22 are exposed and are provided with countersunk apertures 24 to receive fastening screws 25 which are threadedly secured in the core 12. The base members 22 are likewise provided with inwardly projecting positioning pins 26 which are engageable in positioning recesses 27 provided in the core 12. The exposed ends of members 22 inwardly of the ends of the core 12' overlap, the inner end portions of the members 22 being offset or formed with recesses 2S at their bottom margins to receive the arcuate ends of the base portions 22 of the adjacent segments. The apertures 24 of the overlapped margins of the longitudinally adjacent elements 22 are in registry and receive common fastening screws 25. The resultant assembly, shown in FIG- URE 4, provides four coating units on a single roller, adapted to distribute coating material on four parallel sheets of tin plate. As in the previously described embodiment of the invention, whenever one of the resilient deformable outer portions 23 becomes damaged or'worn it can be readily replaced by unfastening its holding screws 24, allowing the damaged section to be removed and to be replaced by a new section.

The rubberstrips of FIGURE l may be formed to define spaced pad sections similar to the spaced surface segments 21 in FIGURE 4.

Referring now to the form of the invention shown in FIGURES 6 and 7, the core, shown at 12, is provided with a plurality of substantially longitudinally extending main coating segments 30, each coating segment comprising a longitudinally extending base strip 31 (see FIGURE 7) which is arcuately curved to conform with the contour of the external surface of the core 12, each base strip 31 having bonded thereon a longitudinally extending resilient deformable exterior coating section 32 of rubber or plastic. The end portions of the sections 30 are arranged for replacement by the provision of detachable end segments 33, each end segment 33 comprising a metal supporting base portion 34 on which is bonded a resilient deformable external section 3S of rubber or plastic material, of the same thickness as the resilient deformable external layer 32 of the associated strip 30. The end portions of the base member 31 of each main strip 30 are recessed, as shown at 37, to receive the relatively thin metal base portions 34 of the replaceable end sections 33. The recesses 37 are further formed with grooves 37 beneath the end margins of the resilient deformable pads 32, as shown in FIGURE 7, said grooves 37 receiving locking tongues or ribs 34 formed on the edges of the base members 34. The base members 34 are formed with securing apertures which register with the securing apertures of the main base strips 31 and which receive the fastening screws 38 Vfor securing the strip assemblies to the core 12. The

arrangement of FIGURES 6 and 7 is for conditions where the end portions of the rollers receive maximum wear so that ordinarily only the end portions of the resilient deformable coating surfaces of the rollers are worn or damaged. With the arrangement shown in FIGURES 6 and 7 it is not necessary to replace entire longitudinal strip assemblies 30, but merely the end portions of said assemblies, namely, the sub-assemblies 33. Thus, whenever the resilient deformable elements of the subassemblie 33 become damaged, they may be readily replaced by unfastening the associated screws 38, allowing the sub-assemblies to be easily removed and replaced by new sub-assemblies 33.

The longitudinal strip assemblies 30 may be made with or without the detachable end segments 33, as desired, and member 31 may therefore be of uniform thickness for the full length thereof instead of being recessed at 37.

The rollers shown in FIGURES 6 and 7 are particularly intended for use in coating sheets of tin plate which are to be subsequently used for stamping out circular can ends, and therefore the edges of the strip assemblies 30 and 33 are given a suitable configuration to assure continuous coating surfaces at the areas which will contain the circular shapes to be stamped out of the coated tin plate sheets. Experience has indicated that the end portions of the resilient deformable external layers of the rollers tend to Wear more rapidly than the inner portions, whereby the arrangement of FIGURES 6 vand 7 allows much more economical utilization of the main segments 30 by making it possible to replace the end portions 33 of the longitudinal strip assemblies of the roller.

FIGURE 8 diagrammatically illustrates the manner in which rollers according to the present invention are employed in a conventional tin plate coating machine. The coating material, shown at 40 is deposited between a pair of distributing rollers 41 and 42, the roller 42 being located longitudinally adjacent to a coating roller, designated generally at 44, constructed in accordance with any of the forms of the present invention above described. Thus, the roller 44 is provided with thc replaceable longi tudinal external segments, for example, the segments 14 illustrated in FIGURES l, 2 and 3. The sheet of tin plate to be coated, shown at 45, is received between the coating roller 44 and a subjacent supporting roller 46. The material 4d is distributed by way of roller 42 to the coating roller 44, which in turn distributes the coating material onto the top surface of the sheet of tin plate 45.

Because of the provision, in the embodiment of FIG- URES 4 and 5, of the generally serrated intertting arrangement of the strip members 30 and of the replaceable end strip segments 33, the strip members provide a mutually interlocking effect on each other, minimizing relative movements of the strip segments with respect to the core 12 and providing smoothly balanced -rolling action. Because of the serrated configuration of the abutting strip edges, any tendency for the resilient deformable material to deform or bulge at said edges is minimized.

It will be apparent that Within the spirit of the present invention, replaceable quick-change outer surface sections as above described may be employed on types of roller cores used in tin plate coating machinery other than those specifically described and illustrated herein.

While certain specific embodiments of improved coating rollers for applying coatings to tin plate have been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. A coating roller comprising a rigid cylindrical main body, a plurality of longitudinally extending, arcuately shaped metal strips detachably secured on said main body in side-by-side contiguous relation and having convex outer surfaces, respective outside layers of resilient deformable material bonded on the convex outer surfaces of said metal strips, additional relatively short, metal strip members detachably secured on the end portions of said first-named metal strips, and respective additional outside layers of resilient deformable material bonded on the outer surfaces of said additional metal strip members and being substantially flush with the first-named outside layers.

2. A coating roller comprising a rigid cylindrical main body, a plurality of longitudinally extending, arcuately shaped metal strips detachably secured on said main body in side-by-side contiguous relation and having convex outer surfaces, respective outside layers of resilient deformable material bonded on the convex outer surfaces of said metal strips, said longitudinally extending metal strips being formed at their ends with recesses, additional metal strip members detachably secured in said recesses, and respective additional outside layers of resilient deformable material bonded on said additional strip members and being substantially flush with the first-named outside layers.

3. A coating roller comprising a rigid cylindrical main body, a plurality of longitudinally extending, arcuately shaped metal strips detachably secured on said main body in side-by-side contiguous relation and having convex outer surfaces, respective outside layers'of resilient deformable material bonded on the convex outer surfaces of said metal strips, said longitudinally extending metal strips being formed at their ends with recesses, additional metal strip members detachably secured in said recesses, and respective additional outside layers of resilient deformable material bonded on said additional strip members and being substantially flush with the first-named outside layers,

said first-named outside layers overlying the inner end margins of said additional strip members.

4. A coating roller comprising a rigid cylindrical main body, a plurality of longitudinally extending, arcuately shaped metal strips detachably secured 0n said main body in sidc-by-side contiguous relation and having convex outer surfaces, respective outside layers of resilient deformable material bonded on the convex outer surfaces of said metal strips, said longitudinally extending metal strips being formed at their ends with recesses, additional metal strip members detachably Secured in said recesses, and respective additional outside layers of resilient deformable material bonded on said additional strip members and be- References Cited bythe Examiner UNITED STATES PATENTS 8/51 Charlton 29--124 X ll/60 Decker 18-21 WALTER A. SCHEEL, Primary Examiner.

LOUIS O. MAASSEL, Examiner. 

1. A COATING ROLLER COMPRISING A RIGID CYLINDRICAL MAIN BODY, A PLURLAITY OF LONGITUDINALLY EXTENDING, ARCURATELY SHAPED METAL STRIPS DETACHABLE SECURED ON SAID MAIN BODY IN SIDE-BY-SIDE CONTIGUOUS RELATION AND HAVING CONVEX OUTER SURFACES, RESPECTIVE OUTSIDE LAYERS OF RESILIENT DEFORMABLE MATERIAL BONDED ON THE CONVEX OUTER SURFACES OF SAID METAL STRIPS, ADDITIONAL RELATIVELY SHORT, METAL STRIP MEMBERS DETACHABLE SECURED ON THE END PORTIONS OF SAID FIRST-NAMED METAL STRIPS, AND RESPECTIVE ADDITIONAL OUTSIDE LAYERS OF RESILIENT DEFORMABLE MATERIAL BONDED ON THE OUTER SURFACES OF SAID ADDITIONAL METAL STRIP MEMBERS AND BEING SUBSTANTIALLY FLUSH WITH THE FIRST-NAMED OUTSIDE LAYERS. 